篦齿封严冲击动力学建模与参数影响研究  

Research on the Impact Dynamics Modeling and ParameterInfluence of Labyrinth Seal

作　　者：张言泽 陈锋[1] 华宏星[1] ZHANG Yanze;CHEN Feng;HUA Hongxing(Institute of Vibration Shock and Noise,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]上海交通大学振动、冲击、噪声研究所,上海200240

出　　处：《噪声与振动控制》2023年第5期39-44,108,共7页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(51975353)。

摘　　要：在冲击载荷作用下,燃气轮机篦齿封严装置可能会与高速旋转的转子发生碰摩。为了揭示在不同冲击载荷和篦齿封严装置结构参数条件下,冲击输入对篦齿封严装置刚度和转子冲击动力学特性的影响机制,本文开展篦齿封严装置冲击动力学建模与参数影响规律研究。从封严环接触模型出发,将欧拉梁理论应用于单圆盘转子-封严装置碰摩模型,计算了封严环篦齿厚度、高度和初始间隙对接触刚度的影响,得到了转子的时域响应和轴心轨迹以及冲击响应的参数影响规律,为篦齿封严装置在冲击接触下的动力学特性研究提供了理论建模和分析方法参考。The labyrinth seal of gas turbines may contact with high speed rotor under impact loading.With different impact loads and structural parameters of the seal,the impact dynamics modeling and effects of parameters of labyrinth seal are studied to reveal the influence mechanism of impact on the stiffness of labyrinth seal and the impact dynamics response.Firstly,the contact model of seal rings is established and extended to a single rotor-seal contact model based on Euler beam theory.Then,the effects of height,thickness and clearance of labyrinth seal on the contact stiffness are calculated.Finally,the response,the orbit of the rotor and the parameter influence are obtained.This research has provided a theoretical and methodological reference for the dynamic analysis of the labyrinth sealing devices under impact loading.

关 键 词：振动与波 篦齿封严 冲击响应 赫兹接触 非线性刚度 

分 类 号：O347.1[理学—固体力学]